Regulator valve



FIG. 1 is a rear, top and right perspective view of a regulator valve showing our new design;

FIG. 2 is a front, top and left view thereof;

FIG. 3 is a left, rear and bottom view thereof; and,

FIG. 4 is a rear, top and right view thereof. 

The ornamental design for a regulator valve, as shown and described. 